Reference for Pesachim 100:11
בני ביישן נהוג דלא הוו אזלין מצור לצידון במעלי שבתא אתו בנייהו קמיה דר' יוחנן אמרו לו אבהתין אפשר להו אנן לא אפשר לן אמר להו כבר קיבלו אבותיכם עליהם שנאמר (משלי א, ח) שמע בני מוסר אביך ואל תטוש תורת אמך:
As for the wages of interpreters, that is well, [the reason being] because it looks like wages for Sabbath [work]; orphans money too, because they are not capable of renunciation;<span class="x" onmousemove="('comment',' He may take more than his due, and a minor cannot legally renounce it in his favour.');"><sup>29</sup></span> money which comes from overseas, because a miracle does not occur every day.<span class="x" onmousemove="('comment',' Considerable danger attended the transport of freights at sea, and one might very easily suffer loss.');"><sup>30</sup></span> But what is the reason for the wages of writers? - Said R'Joshua B'Levi: The men of the Great Assembly<span class="x" onmousemove="('comment',' A body of one hundred and twenty men founded by Ezra, regarded as the bearers of Jewish teaching and tradition after the Prophets; v. Ab. I, 1.');"><sup>31</sup></span> observed twenty-four fasts so that those who write Scrolls, tefillin and mezuzoth<span class="x" onmousemove="('comment',' V. Glos.');"><sup>32</sup></span> should not become wealthy for if they became wealthy they would not write.